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Gastric ulcers induced by systemic hypoxia.
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OBJECTIVE
to assess the effect of systemic hypoxia on gastric mucosa and the activation of stress-responsive transcription factors induced by hypoxia.
METHODS
in this experimental study, rats were allocated to control and experimental groups. The experimental group was divided into subgroups and
Hypoxia-Inducible Factor-1α Gene Expression and Apoptosis in Ischemia-Reperfusion Injury: A Rat Model of Early-Stage Pressure Ulcer.
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BACKGROUND
Pressure ulcer (PU) is a significant and complicated health problem. Although ischemia-reperfusion (I/R) injury has been identified as the primary mechanism in the early stage of pressure ulceration, the cellular and molecular events contributing to I/R injury of PU development are
[Effects of Chinese herbs for replenishing qi and resolving stagnation on hypoxia-inducible factor-1alpha and vascular endothelial growth factor in granulation tissue of skin ulcers in rats with diabetes].
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OBJECTIVE
To explore the effects of Chinese herbs for replenishing qi and resolving stagnation on hypoxia-inducible factor-1alpha (HIF-1alpha) and vascular endothelial growth factor (VEGF) in granulation tissue of skin ulcers in rats with syndrome of blood stasis and qi deficiency.
METHODS
Diabetic
[The role of enzymatic features of hypoxia in ulcers].
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In the pathogenesis of peptic ulcer, development of tissue hypoxia holds a prominent place. Its timely detection and medicamentous correction necessitates development of criteria for its diagnosis. A study was made of activity of the key enzymes of glycolysis and purine metabolism
Linking microvascular collapse to tissue hypoxia in a multiscale model of pressure ulcer initiation.
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Pressure ulcers are devastating injuries that disproportionately affect the older adult population. The initiating factor of pressure ulcers is local ischemia, or lack of perfusion at the microvascular level, following tissue compression against bony prominences. In turn, lack of blood flow leads to
[The role of local factors regulating vascular blood flow in the development of hypoxia of the gastric mucosa in peptic ulcer].
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In 50 patients with gastric ulcer indices of oxygen tension (pO2) levels were investigated in correlation with the concentration of prostaglandins (E and F2 alpha), prostacyclin, thromboxane as well as with values of transmucous difference of potentials in different parts of the gastric mucosa, they
Effect of hypoxia on acetic acid ulcer of the stomach in rats with or without coenzyme Q10.
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As one of the factors contributing to the intractability of chronic gastric ulcer, the effect of hypoxia is examined in this paper, based upon the experimental acetic acid ulcer in the stomach of Wistar rats. Results indicate that hypoxia has a harmful influence on the healing process of chronic,
Impact of the hypoxia inducible factor-1α (HIF-1α) pro582ser polymorphism and its gene expression on diabetic foot ulcers.
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OBJECTIVE
Adaptation to low oxygen tension (hypoxia) in cells and tissues leads to the transcriptional induction of series of genes and the primary factor mediating this response is the hypoxia-inducible factor-1α. This study was designed in order to examine the HIF-1α gene polymorphism, p582s
Esophageal ulceration triggers expression of hypoxia-inducible factor-1 alpha and activates vascular endothelial growth factor gene: implications for angiogenesis and ulcer healing.
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Our previous studies demonstrated that enhanced epithelial cell proliferation is important for healing of experimental esophageal ulcers. However, the roles of angiogenesis, its major mediator, vascular endothelial growth factor (VEGF), and the mechanism(s) regulating VEGF expression during
Association of hypoxia inducible factor-1 alpha exon 12 mutation in diabetic patients with and without diabetic foot ulcer.
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Hypoxia inducible factor 1 alpha (HIF-1α) is a key regulator of the genes involved in the cellular response to hypoxia. This study aims to determine the HIF-1α gene polymorphism and its association with protein expression in diabetic subjects with and without diabetic foot ulcers (DFU). A total of
Relation of hypoxia-inducible factor-1alpha to vascular endothelial growth factor and vasoactive factors during healing of gastric ulcers.
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We studied the relation of hypoxia-inducible factor-1alpha (HIF-1alpha) to vascular endothelial growth factor and vasoactive factors during the healing of gastric ulcers. The gastric ulcers were divided into three stages (active stage, healing stage and scar stage). The expression of HIF-1alpha,
Pericapillary fibrin deposits and skin hypoxia precede the changes of lipodermatosclerosis in limbs at increased risk of developing a venous ulcer.
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This study investigated the possibility that pericapillary fibrin deposition, found in the calf skin of patients with venous ulceration and lipodermatosclerosis, might already be present in the dermis of the gaiter area of apparently healthy limbs before any skin changes were visible. The apparently
[Hypoxia as the common final cause of gastroduodenal ulcer].
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Hypoxia of abnormal physiologic origin as the final common pathway in gastroduodenal ulcer genesis.
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[Role of respiratory and hemic hypoxia in the pathogenesis of chronic gastritis and peptic ulcer in children].
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